Dinosaur–bird link Revealed By Wrist Bone Development During the millions of years that elapsed, wrists went from straight to bent and hyperflexible.

How this wrist bone development happened has been the subject of much debate, with substantial disagreement between developmental biologists, who study how the wings of modern birds develop in the growing embryo, and palaeontologists who study the bones of dinosaurs and early birds. A resolution to this impasse is now provided by an exciting new study publishing on September 30 in PLOS Biology.

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